linux-kernel - [PATCH linux hwmon-next v4 3/3] dt-bindings: (hwmon/sbtsi

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Message-Id: <20201202165601.1532213-4-kunyi@google.com>
Date:   Wed,  2 Dec 2020 08:56:01 -0800
From:   Kun Yi <kunyi@...gle.com>
To:     jdelvare@...e.com, linux@...ck-us.net, robh+dt@...nel.org,
        mark.rutland@....com, supreeth.venkatesh@....com
Cc:     Kun Yi <kunyi@...gle.com>, openbmc@...ts.ozlabs.org,
        linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH linux hwmon-next v4 3/3] dt-bindings: (hwmon/sbtsi_tmep) Add
 SB-TSI hwmon driver bindings

Document device tree bindings for AMD SB-TSI emulated temperature
sensor.

Signed-off-by: Kun Yi <kunyi@...gle.com>
---
 .../devicetree/bindings/hwmon/amd,sbtsi.yaml  | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/amd,sbtsi.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/amd,sbtsi.yaml b/Documentation/devicetree/bindings/hwmon/amd,sbtsi.yaml
new file mode 100644
index 000000000000..446b09f1ce94
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/amd,sbtsi.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/amd,sbtsi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: >
+  Sideband interface Temperature Sensor Interface (SB-TSI) compliant
+  AMD SoC temperature device
+
+maintainers:
+  - Kun Yi <kunyi@...gle.com>
+  - Supreeth Venkatesh <supreeth.venkatesh@....com>
+
+description: |
+  SB Temperature Sensor Interface (SB-TSI) is an SMBus compatible
+  interface that reports AMD SoC's Ttcl (normalized temperature),
+  and resembles a typical 8-pin remote temperature sensor's I2C interface
+  to BMC. The emulated thermal sensor can report temperatures in increments
+  of 0.125 degrees, ranging from 0 to 255.875.
+
+properties:
+  compatible:
+    enum:
+      - amd,sbtsi
+
+  reg:
+    maxItems: 1
+    description: |
+      I2C bus address of the device as specified in Section 6.3.1 of the
+      SoC register reference. The SB-TSI address is normally 98h for socket
+      0 and 90h for socket 1, but it could vary based on hardware address
+      select pins.
+      \[open source SoC register reference\]
+        https://www.amd.com/system/files/TechDocs/56255_OSRR.pdf
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        sbtsi@4c {
+                compatible = "amd,sbtsi";
+                reg = <0x4c>;
+        };
+    };
+...
-- 
2.29.2.454.gaff20da3a2-goog